What this is
This guide helps you resolve the error “Serial number is in use” when trying to disconnect or remove a part in Next Plus.
It’s useful for Editors and Administrators who manage Parts, Serials, and Work Orders in the system.
The error happens when a serial number is still linked to a parent assembly, work order, or stock transaction — even if it doesn’t appear in the immediate workflow screen.
How to fix it
Confirm the serial number
Copy the full serial number (Ctrl + C).
Make sure you are checking the exact format (no missing digits or spaces).
Search in the “Devices” / Inventory view
Go to Reports > Devices (or the Stock Transactions report).
Paste the serial number into the search field.
This shows the current parent linkage and where the serial is in use.
Check for parent assemblies (BOM)
If the serial belongs to a child part, verify whether it is still connected to a higher-level Bill of Materials (BOM).
Example: A fuselage (parent) still references the component, even if the sub-work order looks empty.
Look across multiple work orders
Sometimes, the same serial may appear in a different Work Order or Next (NXT) record (e.g., NXT74 vs NXT76).
Use the report to identify the exact work order where it’s linked.
Remove from reporting before disconnecting
If the serial was already reported in a session, disconnect it first from the session reporting screen.
Only then try removing it from stock or the BOM.
Retry disconnecting
Go back to the workflow or stock item.
Click Disconnect / Remove again.
Save changes — the serial should now release without error.
Common Issues / FAQs
Why does it say “in use” when it looks empty?
Because the serial may still be tied to a higher-level parent, or to a work order that’s not visible in your current session.How do I know exactly where it’s in use?
Use the Devices report or Inventory transactions. They show the full hierarchy and the active parent item.I don’t have permission to delete serials. What now?
Only Admins can fully remove or reassign serials. If you’re an Operator/Editor, escalate to your system Admin.